How do I add custom error pages for Windows hosting?

Step 1: Login to the Plesk panel of the domain name for which you wish to set custom error pages

Step 2: Add the custom error page

Click on Virtual Directories.

Click on Error Documents.

Click on the error for which you wish to customize.

Select URL in the Type menu and enter the path to your document in the Location field. The path should consist of "https://" plus the path to the file.

Example: Your domain name is example.com, and you have created a file named badrequest_400_1.html and saved it in the httpdocs\my_errors directory. To use this file as an error document, you need to type the following URL into the Location field: https://example.com/my_errors/badrequest_400_1.html.